Vacuum operated boiler compound sight feeder



Dec. 17, 1940. B. F. TADE VACUUM OPERATED BOILER COMPOUND SIGHT FEEDER Filed July '7, 1959 IN VENTOR.

B. F. TADE ATTORNEY.

Patented Dec. 17; 1940 PATENT OFFICE VACUUM OPERATED BOILER COMPOUND SIGHT FEEDER Benjamin F. Tade, Canon City, 0010., assignor of one-half to Lou H.

Woodring, Canon City,

Application July 7, 1939, Serial No. 283,222

7 Claims.

This invention relates to vacuum operated boiler compound sight feeders.

The general object of the invention is to provide an improved adjustable eflicient means for feeding certain compounds into a fluid being circulated.

A more specific object of the invention is to provide a sight feeder which is operated by the vacuum in a pulsating pump system for injecting materials into the fiuid being circulated.

Another object of the invention is to' provide a novel valve means for feeding compounds into fluid being circulated.

A further object of the invention is to provide novel means for adjusting the amount of material fed by-a compound sight feeder.

Other objects and the advantages of this invention will be apparent from the following description taken in connection with the accompanying drawing, wherein:

Fig. 1 is a fragmentary side elevation showing my invention installed; and

Fig, 2 is a central sectional view through the feeder.

Referring to the drawing by reference characters I have shown my invention as embodied in a vacuum operated boiler compound sight feeder which is indicated generally at In; As shown the invention includes a body I l which is cylindrical in shape and which includes a bypass |2 the end l3 of which is connected to a fitting M which fitting is also connected to a riser |5 which communicates with a piston operated pump I6.

The entrance portion of the bypass l2 includes a swing check valve I! which is mounted on a horizontal pivot l8 and has an aperture l9 therethrough. The upper end of the bypass includes a vase portion in which a sleeve 2| is mounted. The lower end of the sleeve 2| is apertured to receive a feed tube 22 which projects into a glass sight tube 23 which is held in place at its upper end by a nut 24 and at its lower end is engaged by a nut 25 on a boss 26 integral 0 with the bypass.

nally threaded to receive a threaded control stem 1 33 which is held in adjusted position by a lock nut 34.

The body I has a closure 35 thereon which includes a threaded inlet member 36 connected to a pipe 31 which communicates with a boiler compound container 38 the latter having a liquid level indicator tube 39 communicating therewith.

The cap 35 includes an air vent 40 opening to the interior thereof below a partition 4| which includes a depending boss 42 which is internally threaded to receive a threaded valve body 43 which has a valve seat 44 engaged by a ball valve 45. The valve body extends downwardly at 45 surrounding and spaced from the stem 33 previously mentioned.

Above the partition 4| the cap includes a boss 41 which is internally threaded at 48 with the threads engaged by threads on a control stem 49. The stem 49 extends downwardly through the boss 42 and valve body 43' to a location ad- J'acent the valve ball 45. The stem 49 is enlarged at its upper end 50 and passes through 'a packing gland 5| on the cap. The upper end of the stem is threaded at 52 with the threads of such size that the stem is free to slide through the gland 5|. A lock nut 53 engaging the end of the stem and the gland nut 5| serves to hold the stem in adjusted'position. The stem is shown as slotted at 54 to receive a screw driver so that it may be turned. f

The fitting 14 previously mentioned is connected by a pipe 55 with the container 38. The pipe 55 includes a valve 56. The fitting I4 is also connected by a pipe 51 with a boiler or other container 58 which receives the fluid from the pump IS.

The piston 3| includes a plurality of holes 59 which afiord communication through the bottom of the piston into the sleeve 2|.

In operation the fluid from the pump will normally stand in the riser |5 until it is lowered upon the suction stroke of the pump. This lowering of the fluid level creates a partial vacuum in the by-pass 2 and lower part of the cylinder I thus drawing the piston 3| downwardly, thus lowering the stem 33 and permitting the ball valve 45 to engage its seat and thereby closing communication from the container 38 to the cylinder On the compression stroke of the pump the reverse movement occurs and air is compressed beneath the piston 3| thus raising the latter so that the stem 33 lifts the ball valve 45 and allows some of the fluid in the container 38 and cap 35 to pass the valve seat 44 whence it flows onto the piston 3| into the sleeve 2|, through the tube 22 and through the sight tube 23 and onto the valve 28. On the succeeding suction stroke the valve 28 is drawn from its seat and the fluid from the container 38 passes into the fluid being circulated by the pump. The valve 28 remains closed during the compression strokes so that the pumped fluid will not pass this valve.

By loosening the nut 53 the position of the stem 49 can be'adjusted so that the limit of movement of the valve 45 can be adjusted.

Loosening of the nut 34 allows the stem 33 to be adjusted relative to the piston 3| so that the action of the piston in opening the valve can be adjusted.

On the suction stroke air enters the vent 40 so that no partial vacuum is present in the cylinder H.

The pipe 57 includes a one way valve 57 which is arranged so that water passes to the boiler on the compression stroke but fluid cannot leave the boiler on the suction stroke.

The swing check valve swings open on the suction stroke of the pump and closes on the compression stroke. On the compression stroke water passes through the hole IQ in the check valve so that the entrance of too much fluid which might flood the feeder is avoided.

With my invention the stroking of the pump operates the feeder so that the operation is positive and the device will deliver any predetermined amount of fluid into the circulation system in each stroke regardless of the speed of the pump.

From the foregoing description it will be apparent that I have invented a novel vacuum operated boiler compound sight feeder which is simple in construction and is highly eflicient for the intended purpose. 7

Having thus described my invention, I claim:

1. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass communicating therewith, fluid conducting means connecting said cylindrical portion and the lower portion of the by-pass, a piston mounted to reciprocate in said cylindrical portion, a closure on said cylindrical portion, said closure including a partition, a vent leading to the interior of said cylindrical portion, a valve for controlling passage of fluid from one side of the partition to the other, means on said piston for actuating said valve, means adjustable to control the movement of said valve, said closure including an inlet, and said piston having apertures communicating with said connecting means.

2. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass located at one side of the cylindrical upper portion and communicating therewith, means connecting said cylindrical portion and the lower portion of the by-pass, a piston mounted to reciprocate in said cylindrical portion, a stem engaging said piston, a cap on said cylindrical portion, said cap including a partition, a vent in said cap leading to the interior of said cylindrical portion, a valve body mounted on said partition and including a valve in the path of said stem, a second stem mounted on said cap and adjustable towards and from said valve, said cap including an inlet, said piston having apertures communicating with said connecting means.

3. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass located at one side of the cylindrical upper portion and communieating therewith, means connecting said body and the lower portion of the by-pass, a piston mounted to reciprocate in said cylindrical portion, a stem engaging said piston, a cap on said cylindrical portion, said cap including a partition, a vent in said cap leading to the interior of said cylindrical portion, a valve body mounted on said partition and including a valve in the path of said stem, a second stem mounted on said cap and adjustable towards and from said valve, said cap including an inlet, said piston being cup shaped and having apertures in the wall thereof and means to afford communication between the area above said piston and the lower portion of said by-pass.

4. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass located at one side of the cylindrical upper portion and communicating therewith, means including a sight tube and a one way valve connecting said body and the lower portion of the by-pass; a piston mounted to reciprocate in said cylindrical portion, a stem engaging said piston, a cap on said cylindrical portion, said cap including a partition, a vent in said cap leading to the interior of said cylindrical portion, a valve body mounted on said partition and including a valve in the path of said stern, a second stem mounted on said cap and adjustable towards and from said valve, said cap including an inlet, said piston being cup shaped and. having apertures in the wall thereof and means to afford communication between said piston apertures and said sight tube.

5. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass located atone side of the cylindrical upper portion and communicating therewith, a sleeve extending. into said cylindrical portion, means including a sight tube and acne way valve connecting said tube and the lower portion of the by-pass, a: piston mounted to re ciprocate in said cylindrical portion, said piston having a sleeve slidable on the first mentioned sleeve, a stem engaging said piston, a closure on said cylindrical portion, said closure including a partition, a valve body mounted on said partition and including a valve in the path of'said stem, a second stern mounted on said closure and in the path of said valve, and a container, said closure including an inlet to the container, said piston having apertures communicating with said sleeves.

6. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pass located at one side ofthe cylindrical upper portion, a sleeve extending into the lower end of said cylindrical portion, a tube projecting below said sleeve, a sight tube surrounding said first mentioned tube and having one end secured to. the lower end of the cylindrical portion, a boss on said by-pass, means to secure the other end of said sight tube to saidboss, a valve mounted in said boss including an inlet communicating with the sight tube and an outlet into the by-pass, a piston mounted to reciprocate in said cylindrical portion, a sleeve on said piston and slidable on the first mentioned sleeve, said piston including. a threaded portion, a stem engaging said threaded portion, a cap on said cylindrical portion, said cap including a partition, a vent in said cap leading to the interior of said cylindrical portion, a valve mounted on. said partition and including a portion surrounding said stem, said valve including a valve seat adjacent the upper portion of said stem, a valve ball engaging said seat, and means on said cap to limit the movement of said ball, said cap including an inlet to the container, said piston having apertures communicating with said sleeves.

'7. In a vacuum operated boiler compound sight feeder, a body having a cylindrical upper portion and having a by-pa-ss located at one side of the cylindrical upper portion, a sleeve on the body and extending into the lower end of said cylindrical portion, a tube projecting below said sleeve, a sight tube surrounding said first mentioned tube and having one end secured to the lower end of the cylindrical portion, a boss on said by-pass, means to secure the other end of said sight tube to said boss, a valve mounted in said boss and including an inlet communicating with the sight tube and an outlet opening into the by-pass, a

piston mounted to reciprocate in said cylindrical portion, said piston having a sleeve thereon slidably engaging the first mentioned sleeve, said piston including a threaded portion, a stem adjustably engaging said threaded portion, a cap on said cylidrical portion, said cap including a partition, a vent in said cap leading to the interior of said cylindrical portion, a valve body mounted on said partition and including a portion surrounding said stem, said valve body including a valve seat adjacent the upper portion of said stem, a valve ball engaging said seat, a second stem mounted on said cap and adjustable towards and from said ball, a container, said cap including an inlet to the container, said piston being cup shaped and having apertures in the wall thereof communicating with said sleeves.

BENJAMIN F. TADE. 

